KISSIMMEE, Fla. -- Nationals second baseman Dan Uggla is having a productive spring. In Friday's 7-5 victory over the Astros, Uggla went 1-for-2 to raise his batting average to .292 with a homer and four RBIs.

Manager Matt Williams has declined to label Uggla as a backup. Uggla has been an everyday player in his career until last season.

"We haven't defined any roles," Williams said. "What we do know at this point is that he is seeing the ball well and he is playing well. I like his at-bats. We are giving him as much time as we can in every aspect -- starting a game, coming off the bench as a pinch-hitter, everything we can possibly think of to get him used to everything.

"We haven't defined those roles yet because we just don't know. We don't know about Yunel [Escobar]. For that matter, we don't know about Anthony [Rendon] either. We are just letting Dan play and make sure he is getting plenty of at-bats. When the time comes, we will make the decisions."